Paper-shell cartridge.



0. H. STEVENSON.

PAPER SHELL CARTRIDGE.

APPLIDATION FILED 11136.29, 1912.

Patented Apr. 1, 1913.

omen STATES PATENT caries.

CHARLES H. STEVENSON, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T WINCHESTERREPEATING ARMS 00., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

PAPER-SHELL CARTRIDGE.

Specification of Letters Patent.

Patented Apr. 1,1913.

- at New Haven, in the county of New Haven and State of Connecticut,have invented a new and useful Improvement in Paper- Shell Cartridges;and I do hereby declare the following, when taken in connection with theaccompanying drawings and the characters of reference marked thereon, tobe a full, clear, and'exact description of the 'same, and which saiddrawings constitute part of this application, and represent, in-

Figure 1 a view in side elevation of a paper-shell cartridge constructedin accordance with my invention. Fig. 2 a broken View of the paper tubein transverse section, on an enlarged scale, on the line a-b of Fig.1.Fig. 3 a plan view of such a sheet of paper as may be used in producinga long tube to be cut up into short lengths for use in the manufactureof paper-shell cart-ridges.

My invention relates to an improvement in that class of ammunition knownas papershell ammunition, the object being to make suchammunitionmoisture-proof to better adapt it to be loaded with bulksmokeless powders which are extremely hygroscopic in their character,and therefore. liable to undergo ballistic changes of a serious nature.

With these ends in view, my invent-ion consists in a sheet of locallytreated paper to be used in the manufacture of paper-shell cartridges aswill be hereinafter described and pointed out in the claim.

In carrying out my invention as shown herein, the paper-sheet 2 used forthe production of the long tube which is subsequently cut up intopaper-shell cartridge lengths 3 on the broken lines 4, is fabricatedwith'a moisture proof area 5 and a colored area 6, these areas meetingeach other, but separating on a clear line of demarcation 7 so, that themoisture-proof substance, whatever it may be, is not brought intoconflict with the coloring substance, whatever itmay be, and vice versa,whereby any opportunity for one substance to nullify ,or affect theother is avoided." The areas 5 and 6 are oblong in their character andextend from one side edge of the sheet 2 to the other, at a right angleto the width of the sheet, which is the direction in which it is coiled.As shown, the areas 5 and 6 each constitute I of paper about one-thirdof the width of the sheet, each area being wide enough to form one ormore coils with a slight overlap, the number of coils depending on thegage or diameter 9f the shells and the width of the sheet of paper.

I do not limit myself to any particular mode of producing the sheet 2beyond producing it in such a manner that the areas 5 and 6 shall beincorporated with the sheet at the time of its fabrication at the mill,so that these areas will be truly integral with the very substance ofthe sheet. The moisture-proof substance employed for producing themoisture-proof area5 will be selected according to circumstances. I may,for in stance, use varnish compounded from the insoluble soaps of fattyoils such as aluminum oleate, the aluminum or calcium soap of linseedoil, etc, these soaps being dissolved in suitable solvents such asbenzole or petroleum ether. After the long tube has been coiled, it maybe Water-proofed, if desired, though this is not essential to myinvention I My improved paper-shell cartridge will, on account of thepresence in it of one or more integral interior moisture-proof'protective coils, prevent the entrance of moisture tot-he powder incase the shells are stored in a damp place or prevent the powder fromgiving up its right proportion of moisture in case the shells are storedin a dry place, whereby the shells are prevented from undergoingundesirable ballistic changes due to the hygroscopic character of bulksmokeless powders.

If preferred, moisture-proof area 5 may constitute the inner portion ofthe sheet 2 and be separated from the colored area 6 by an untreated orneutral area 8, or the moisture-proof area may be spread over the entiresheet barring the area of coloration 6.

I claim As a new article of manufacture, a sheet for being coiled intotubes to be cut up into paper-cartridge shell-lengths, the said paperhaving coloration, moistureproof, and untreated areas of which thecoloration area forms the outer portion of the sheet so as to produce anexterior colored coil for the completed tube, and the mo1store-proofarea the intermediate portion of the sheet so as to produce anintermediate moisture-proof coil in the interior of the In testimonywhereof, I have signed this tube and the untreated area the innerporspecification in the presence of two subtion of the sheet so as toproduce an unscribing Witnesses.

treated coil upon the interior of the tube in CHARLES H. STEVENSON. 5which the moisture-proof coil is interposed Witnesses:

between the exterior colored coil and the THOMAS C. JOHNSON,

interior untreated coil. DANIEL H. VEADER.

